Grand Seiko’s Spring Drive 200m diver’s watch has always been appreciated for its precision, functionality, and robustness. Now, in compliance with ISO standard 6425:2018, its legibility at depth is further enhanced by the inclusion of LumiBrite at all twelve hour indexes, including the one at three o’clock to the right of the calendar frame.
SBGA461 is rated to 200 meters, and the case and band are made with stainless steel. It measures 44.2mm in diameter, 14mm in thickness, and 50mm in length. The rotating bezel is designed for simple maintenance and the area around the crown has been crafted to ensure that residue from dirt, sand, or seawater can be easily washed off. On the dial, the multi-faceted LumiBrite indexes are affixed via a swaging process that ensures their resistance against shocks.
Inside is Grand Seiko’s Spring Drive 9R65 caliber, which combines the motive force of a mainspring with the high precision of a quartz watch.